Arcade Kollection is essentially a known quantity, while Apocalypsegeddon is ... well, maybe it's a quantity that shouldn't be known.
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There are new Xbox Live Arcade games released every week. We realize that our readers are busy, attractive people, and may not have time to download and examine each and every new XBLA game. You've got busy, attractive person stuff to do, after all. Not to worry though, because we've done the work for you, downloading every single trial game and giving you a taste of what to expect. Watch XBLA in Brief every week to see which games deserve a closer look. When you have the time, of course.